MCS301 - 3ph meter Page 71 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
14.2 Alarm Management
Some of the critical events are considered as Alarms. The Alarms can be sent to the central
system using the Push mode. The Data Notification Service of DLMS is used to send the
Alarms to central system. The Alarm sending process is depicted in below figure.
Figure 18: Alarm handling
As has been shown in Figure 16, different parts are involved in alarm handling process.
These parts are as follows:
• Alarm Register;
• Alarm Filtering;
• Alarm Descriptor:
• Reporting (sending) Alarm;
The details of each part is presented in the following sections.
14.2.1 Alarm register
The Alarm register are intended to log the occurrence of alarms. This is a 4 Bytes register.
Each Bit in the alarm register represents an alarm or a group of alarm. If any alarm occurs,
the corresponding Flag in the alarm register is set and an alarm is then raised via
communication channel. All alarm flags in the alarm register remain active until the alarm
registers are cleared. The value in the Alarm Registers is a summary of all active and
inactive alarms at that time.
The Bits of the Alarm Registers may be internally reset, if the “cause of the alarm” has
disappeared. Alternatively, bits in Alarm Register can be externally reset by the DLMS client.
In external resetting case (by DLMS client), Bits for which the “cause of alarm” still exists will
be set to 1 again and an alarm will be issued.
There are 2 Alarm Registers available: “Alarm Register 1” and “Alarm Register 2”.
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